Definitions

Umbonal spine

• Hollow, minute to large spinose projection of conchostracan carapace that may involve entire umbo; may be curved, looped, or represented as node or nipple. [Larval condition characteristic in Vertexiidae.]. [Moore and McCormick, 1969]
• Hollow, minute to large, curved, looped, or nodular spinose projection, sometimes involving entire umbo. [McLaughlin, 1980]

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Citing this glossary: For individual definitions, please cite the specific author(s) of the definition.
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Martin, J.W., N.D. Pentcheff, D. Striley, C. Perrodin, A.R. Wall, J. Wall, and J. Zieba (editors). Crustacea Glossary. Crustacea Department, Natural History Museum of Los Angeles County. Accessed: 8 Nov 2024. URL: https://research.nhm.org/glossary